where in new york are the marcellus and utica shales?? · where in new york are the marcellus and...
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Where in New York are the Marcellus andUtica Shales??
How do they get to the gasresource and how do they get the gas out of the ground?
What are the concerns aboutthis entire process and what can/should we do about it?
Bill KappelUSGSIthaca, [email protected]
Schlumberger, Inc
Depth and extent of the Marcellus Shale
Marcellus, NY type section
Source – dSGEIS, 2009
Thinning of Oatka Creekand Union Springs members
Thickening of Oatka Creek
East-West Geologic Section of the Marcellus Shale Across Southern New York
Lash and Engelder, 2009
North-South Geologic Section Across New York State
Marcellus Shale
Utica Shale
Union Springs
Cherry Valley
Oatka Creek
Marcellus Stratigraphy
Medina SSCentral/Western NY
Oil and Gas wellsare not new in Pennsylvania andNew York…….
…and there aredifferent regulationsin and within each state.
Multiple steel casingswith high-strength cementto isolate well from surroundingaquifers and bedrock units.
What is different about Marcellus/Utica shale gas development?
East-northeast trending J1 fractures more closely spaced and cross-cut by less well-developed, northwest-trending J2 fractures
Drill horizontal wells to the north-northwest, or south-southeast that cross and drain densely developed J1 fractures
Dual porosity gas reservoir where fractures drain rapidly and matrix drain slowly
Connect matrix porosity to the wellbore by intersecting multiple J1 fractures
Free gas and adsorbed gas in matrix
Horizontal Drilling in Black Shale with High-Volume Hydraulic Fracturing
4,000 ft
3,50
0 ft
Marcellus Shale Gas Development
Meyer (2009)
Microseismic Monitoring of Hydraulic Fracturing
“Typical” Drillpad Design
Water-source pond
Drill cuttings pond
Drilling Phase – drillrig, pumps, supplies, frack tanks(a month or two)
Hydro-fracking Phase –(a week or two)
Injection pumps, supplies,and many frack tanks for fresh and flowback waters
Municipal Water
Ground Water
Surface Water
Inter-basin Trans-fer
Where do you get the water for fracking?
Each source has its own set of concerns…….
What is the quality of the frack and flowback water?
Typical Components of Frack FluidFor a 1.5 million frack job, the 0.5 percent is equivalent to 7,500 gallons of “chemistry”.
(Arthur, Bohn, Layne, 2008, ALL Consulting)http://www.all-llc.com/shale/GWPCMarcellusFinal.pdf
What do we do with the flow-back water after the hydrofrac process is complete, and the formation water as gas is produced from the well?
Constituent 1st Third 2nd Third Final Third Units
Bromide 124 479 753MG/LChloride 18,600 80,500 109,000MG/LSulfide <0.50 29.5 <2.5 MG/LT. Dissolved Solids 34,578 133,620 192,000MG/LTemperature 29.3 29.4 25.3Degrees CBarium 668 6,100 8,730MG/LIron, Total 23 31.3 71.9MG/LMagnesium 69.3 572 890MG/LGross Alpha 1,159 22.41 18,950pCi/LGross Beta 6,500 9.68 7,445pCi/LRadium 226 33 2.58 4.67pCi/LRadium 228 4.66 1.15 18.41pCi/LManganese, Total 0.73 1.8 2.79MG/L
Mercury, Total <0.0002 <0.0002 <0.0002 MG/L
Molybdenum, Total 0.16 0.72 1.08MG/L
Nickel, Total 0.03 0.07<0.01 MG/L
Selenium, Total <0.02 <0.02 <0.02 MG/L
Silver, Total <0.01 <0.01 <0.01 MG/L
Thallium, Total <0.02 <0.02 0.1MG/L
Titanium, Total 0.06<0.01 <0.01 MG/LZinc, Total 0.036 0.028 0.035MG/L
Frack Water Return –(Flowback Water)Total volume injected (1.5 million gal), returned over a 2-week period of time.
(From a well in SW Pennsylvania.)
Potsdam sandstone
Trenton-Black River carbonates
MRCSP
DISPOSAL OF FRACK WATER BY DEEP WELL INJECTION
Marcellus Shale
Utica Shale
DISPOSAL OF FRAC WATER -BY MUNICIPAL WASTEWATER TREATMENT PLANTS
AND DISCHARGE TO SURFACE WATER
Monongahela River at Elizabeth, PA
Previous Maximum Specific Conductance
Specific conductance, in uS
/cm
Black Box
Proposed “Black box(es)”pretreatment systemsto remove ‘constituentsof concern’ prior to other treatment, reuse, ordischarge
New Concepts to Reduce Flowback Volume
Reduce frack volumes Use minimal frack volumes followed by a freshwater for
application of frack pressures
Leave more frack fluid in the hole Assumes down-hole gas will pass through the spent frack fluids
Use of liquefied propane instead of water LP turns back to a gas and can be recovered for reuse.
Bottom Line – The gas industry wants to reduce the volume of water used.
Reuse / Recycle the flowback
Local Water-Resource Concerns
• Protection of surface water and groundwater during entire process
• Drill pad construction, storm runoff, chemical storage, and handling
• Drilling & hydro-fracturing process – cuttings and fluid handling
• Transportation of water & waste fluids to and away from site
•Flowback disposal -- Variable mineral and water-quality characteristics – Brines, oil & grease, heavy metals, radiochemicals, organics
•Site remediation when done
Bottom line – we need water-quality data prior to, during, and following drillingto determine the impact, or lack thereof, on the resources of NYS
Regional Water-Resource Concerns
• What are the regional characteristics of black shale bedrock formationsthroughout the Marcellus, Utica, and other potential gas-bearing units?
• Geologic nature – thickness of units, fracture tendencies, faults, etc.?
• Geochemical nature – how variable are the mineral and water-quality characteristics?
• Radiochemical nature – what radioisotopes are present and are theymobile, or made-mobile during drilling and fracking?
Proposed – A regional Marcellus Play database wherein data fromacross the play is entered into a USGS-maintained database and is available to be accessed by all.
Bottom line – We need to understand/document existing conditions prior and during the gas development/production process to assess and monitor our water, air, environmental resources.
Pipeline infrastructure and land disturbance
ExistingMajorPipelines
Potential new pipelinesin Pennsylvania
These are onlythe majortransmission pipelines, not the gatheringor intermediatepipelines
Range Resources, 2009
Considerations in relation to what a Village, Town, or County can and can’t do in relation to
shale-gas development within their jurisdiction.
Regulation of Oil, Gas, and Solution Mining Drilling and ProductionEnvironmental Conservation Law (ECL), Article 23, Titles 1 to 13, Title 19Regulation 6 NYCRR Part 550-559
New York’s Oil, Gas and Solution Mining Law specifically supersedes all locallaws or ordinances relating to the regulation of the oil, gas, solution mining,and brine disposal industries, but reserves to local governments jurisdictionover local roads and the rights of local governments under the Real PropertyTax Law.
Under the Oil Gas and Solution Mining Law the jurisdiction can:(this interpretation is by a hydrogeologist, not a lawyer – “Caveat emptor” )
Table 15.1 - Oil, Gas, Solution Mining and Brine disposal - Interagency Coordination
Regulate the use and bonding of local roads (with proper documentation)
Tax “value” of gas or oil from production wells – information provided by NYS Office of Real Property Services
Regulate, to a degree, the location of new wells (DEC) and gas pipelines (PSC) near agricultural districts, wetlands, & water supplies through SEQRA reviews.
Regulate the disposal (road spreading) of brine on roadways and use of the jurisdictions’ wastewater treatment plant(s) to treat flowback/formation waters.
Regulate the use (sale) of municipal water (from that jurisdiction)for the drilling and hydrofracking processes.
Follow-up on Oil and Gas complaints but only after County Health Department does their assessment – local jurisdiction has a secondary role.
Monitoring Framework Concept
US GS
Questions?
Gary Larson, 1981
Bill